Al F4 Rb Bulou A, Nouet J Journal of Physics C: Solid State Physics 15 (1982) 183-196 Structural phase transitions in ferroelastic Rb al F4: I. DSC, x-ray powder diffraction investigations and neutron powder profile refinement of the structures _cod_database_code 1000454 _database_code_amcsd 0013169 5.1375 5.1375 6.2912 90 90 90 P4/mbm atom x y z Rb1 0 .5 .5 Al1 0 0 0 F1 .2801 .2199 0 F2 0 0 .2771